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PRINCIPAL ACCOUNTING POLICIES - Statutory reserves (Details) - China | 12 Months Ended
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Dec. 31, 2022
Statutory reserves disclosures |
Portion of after-tax profit to be allocated to general reserve under PRC law (as a percent) | 10.00%
Maximum percentage of statutory general reserve related to entity's registered capital | 50.00%

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- Definition For entities incorporated in PRC or its province, the minimum percentage of the after-tax net income allocated to a statutory reserve until the reserve balance is a specified percentage of the registered capital. + References No definition available. + Details
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Namespace Prefix: | tcom_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition For entities incorporated in PRC, the ratio of the statutory reserve to the registered capital which triggers the elimination of the requirement to contribute to the statutory reserve. + References No definition available. + Details
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Namespace Prefix: | tcom_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Schedule of Statutory Reserves [Line Items] + References No definition available. + Details
Name: | tcom_ScheduleOfStatutoryReservesLineItems
Namespace Prefix: | tcom_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_StatementGeographicalAxis=country_CN
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Data Type: | na
Balance Type: |
Period Type: |